CVE-2023-39363

{"id": "CVE-2023-39363", "metrics": {"cvssMetricV31": [{"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.2}, {"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.9, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 2.2}]}, "published": "2023-08-07T19:15:11.873", "references": [{"url": "https://github.com/vyperlang/vyper/pull/2439", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/vyperlang/vyper/pull/2514", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/vyperlang/vyper/security/advisories/GHSA-5824-cm3x-3c38", "tags": ["Exploit", "Patch", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://hackmd.io/@LlamaRisk/BJzSKHNjn", "tags": ["Exploit", "Third Party Advisory"], "source": "security-advisories@github.com"}, {"url": "https://hackmd.io/@vyperlang/HJUgNMhs2", "tags": ["Exploit", "Third Party Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Modified", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-863"}]}], "descriptions": [{"lang": "en", "value": "Vyper is a Pythonic Smart Contract Language for the Ethereum Virtual Machine (EVM). In versions 0.2.15, 0.2.16 and 0.3.0, named re-entrancy locks are allocated incorrectly. Each function using a named re-entrancy lock gets a unique lock regardless of the key, allowing cross-function re-entrancy in contracts compiled with the susceptible versions. A specific set of conditions is required to result in misbehavior of affected contracts, specifically: a `.vy` contract compiled with `vyper` versions `0.2.15`, `0.2.16`, or `0.3.0`; a primary function that utilizes the `@nonreentrant` decorator with a specific `key` and does not strictly follow the check-effects-interaction pattern (i.e. contains an external call to an untrusted party before storage updates); and a secondary function that utilizes the same `key` and would be affected by the improper state caused by the primary function. Version 0.3.1 contains a fix for this issue."}], "lastModified": "2023-09-18T21:15:55.163", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:vyperlang:vyper:0.2.15:*:*:*:*:python:*:*", "vulnerable": true, "matchCriteriaId": "D77BED2E-B82A-49C3-A555-04F77E181013"}, {"criteria": "cpe:2.3:a:vyperlang:vyper:0.2.16:*:*:*:*:python:*:*", "vulnerable": true, "matchCriteriaId": "1DF78911-B188-4F6F-8E8A-BF120C425C8F"}, {"criteria": "cpe:2.3:a:vyperlang:vyper:0.3.0:*:*:*:*:python:*:*", "vulnerable": true, "matchCriteriaId": "B371A623-7B66-4D86-A8E9-0CBC01AEC1F4"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}